摘要
在GPS实时单点定位参数估计中,待估参数的收敛时间及稳定性与定位精度同样重要,如果参数解算花费很长时间,则不能满足实时定位要求。影响实时单点定位参数解算收敛时间的因素包括观测数据质量、采样间隔、误差模型、卫星空间几何构型以及用户所要求达到的精度等,在分析这些影响因素的基础上,提出了改善收敛时间的措施,并进行了相关算例分析。
In parameter estimation of GPS real time precise point positioning （RT-PPP）, the convergence time of estimated parameters is as important as the positioning accuracy, if it takes more time to calculate coordinates and ambiguity parameters,it is difficult to meet the need of RT-PPP. There are many factors affecting the convergence time of GPS - PPP, quality of observations, sampling intervals, eyror model, satellite geometry distribution, accuracy required by user and so on. Some valid ideas are put forward to improve convergence time on the basis of analyzing these factors. What is more, we take some examples for analyzing the effect factors.
出处
《大地测量与地球动力学》
CSCD
北大核心
2009年第5期107-111,共5页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(40904001)
中国博士后科学基金(20080440049)
国家测绘局重点实验室重点基金(2009A01)
